Method of weaving and a fabric woven according to this method of weaving



United States Patent Inventor Lambertus 1e Strake, Deurne, NetherlandsAppl. No. 757,038

Filed Sept. 3, 1968 Patented Oct. 6, 1970 Priority Sept. 20, 1967,

Netherlands 6712856 METHOD OF WEAVING AND A FABRIC WOVEN ACCORDING TOTHIS METHOD OF WEAVING 1 Claim, 3 Drawing Figs.

U.S. Cl 139/116, 139/127, 139/383 Int. Cl D03d 49/50, D03d 23/00 FieldofSearch .Q 139/116, 122, 122(W), 127, 127(P), 383

References Cited UNITED STATES PATENTS Hunt 139/383 2,795,244 6/1957Shimwell 139/383 2,816,577 12/1957 Shimwell 139/383X 3,303,857 2/1967Scheefel 139/127 FOREIGN PATENTS 954,147 4/1964 Great Britain...139/12711) 1,042,867 9/1966 Great Britain 139/122 Primary Examiner.lamesKee Chi AttorneyMarshall & Yeasting ABSTRACT: In this method, first oneand then the other leg of each of a plurality of successivehairpin-shaped wefts are picked into a shed by jet action of a fluid,and the shed is changed between successive picks. With each pick, atleast two weft threads are introduced simultaneously from one end of theshed, so that every hairpin-shaped weft introduced from that end of theshed consists of a hairpin-shaped sheaf of at least two threads, whileevery hairpin-shaped weftintroduced from the other end of the shedconsists of a single thread.

The invention relates to a method of weaving to provide arbitraryinterlacing.

The invention relates also to a fabric woven with the method accordingto the invention.

In weaving of fabrics heavy wefts are used next to thin wefts in orderto obtain a visual effect. After a number of comparatively thin weftshave been interlaced into the cloth a heavy or thick effect thread isinterlaced.

In order to obtain this result, weaving machines operating with shuttleshave been provided with a relay box in order to replace a shuttle havinga thin thread, after a number of picks, by a shuttle provided with athick effect thread. In a loom operating with a gripper shuttle for theweft a thread presenting device is controlled in such a manner that thegripper shuttle can pick up a certain kind of a weft and draw this weftinto the shed when one kind of a weft is to alternate with another kindof weft. Stationary thread packages are situated in such weavingmachines and each package carries a certain kind of thread.

SUMMARY OF THE INVENTION When use is made of weaving machines in whichwefts are drawn from stationary thread packages and in which the weftsare inserted into the shed by means of jet action of a fluid, anespecial visual effect can be given to the fabric without the provisionof special measures for changing the kind of weft. This can be attainedwith a new method in which according to the invention two or more weftsare inserted in the open shed and are interlaced with the warp threads.In a further application of this method it is possible to insert two ormore wefts simultaneously in the shape of a sheaf into the open shed. Indeveloping the method according to the invention it has been found thata sheaf of threads can be easily conveyed through a device for preparinga weft and through a weft inserting device as used in such kinds ofweaving machines. In an especial application of the method according tothe invention, after the insertion of two or more wefts in the sameopening of the shed, one or more single wefts are inserted after theshed has been changed.

In performing the method according to the invention a weaving machine inwhich the wefts are inserted by means of jet action of a fluid need notbe provided with special means when the method according to theinvention is performed in such a manner that two or more wefts which areto be inserted into the shed in the shape of a sheaf .and simultaneouslyare to be interlaced with the warp threads are inserted from one end ofthe shed, whereas the single wefts which are separately interlaced areinserted from the opposite end of the shed. Depending on the manner ofpresenting the wefts the method of weaving according to the inventioncan be used in weaving machines in which the wefts are to be insertedinto the shed by means of a gripper shuttle. In this case someprovisions are to be made in the presenting device for the weft.

A variation in the pattern of the visual effect can be also performedwith the method of weaving according to the invention in which after theinsertion of two or more wefts which are simultaneously interlaced withthe warp, again two or more wefts are inserted after the shed has beenchanged, and the last two or more wefts are simultaneously interlacedwith the warp thread.

BRIEF DESCRIPTION OF THE DRAWINGS three wefts each.

FIG. 1 is a diagram showing interlacing of a single-straight fabric inwhich sheafs of two simultaneously interlaced wefts have been inserted;

. 2 is an enlarged plan view of the fabric shown in the diagram of FIG.1, and

FIG. 3 is a similar diagram of interlacing of a single straight fabricaccording to FIG. 1, however, provided with sheafs of DESCRIPTION OF THEPREFERRED EMBODIMENTS A single straight interlacing has been chosen inthe diagrams of the drawing, however, the methods of weaving can be usedin any known kind of weave.

Use has been made of two groups of warp threads in the embodiment shownin FIG. 1, consisting in an odd chain 1 and an even chain 2. The weftshave been formed by single wefts 3 and sheafedwefts 4. In the diagramaccording to FIG. 1 the sheafed wefts consist in separate weft threads4and 4". In the embodiment of the fabric shown in FIG. 2 the wefts havebeen interlaced into the cloth in the shape of'a hairpin. Such cloth ismanufactured on weaving machines in which the wefts have been drawn fromstationary thread packages either 'by means of a gripper shuttle or bymeans of a device for weft insertion by means of jet action of a fluid.This kind of weaving in which the wefts have the shape of a hairpin isgenerally known. Each hairpin-shaped weft 3 and 4 consists in a leg A orA, which has been inserted into the shed and interlaced into the clothfirst and a leg 8;, or B. which is to be inserted after a leg of anotherweft has been inserted into the shed from the opposite end thereof andhas been interlaced in the cloth. Further, after the legs 8;, and B ofthese wefts are inserted and after interlacing in the cloth new weftsare inserted beginning with the leg A; or A...

Instead of a sheaf of two wefts 4"and 4sheafs can be provided comprisingmore than two wefts. In the weaving diagram according to FIG. 3 sheafsof three wefts 4', 4" and 4" have been provided. Sheafs comprising alarger number of wefts can be provided also.

The method of weaving according to the inventioncan be used in weavingmachines provided with a device for weft insertion by means of jetaction of a fluid. In spite of the complicated path of the thread whichis drawn from the stationary thread packages through such a known deviceno special provisions have been made as the threads after drawing themfrom the thread packages will stick together and will easily run throughthe device after which they can be inserted into the shed.

I claim:

1.A method of weaving to provide arbitrary interlacing of weft threads,comprising the steps of picking into a shed first one and then the otherleg of each of a plurality of successive hairpin-shaped wefts by jetaction of a fluid, the legs of some hairpin-shaped wefts being pickedinto the shed from one end and the legs of other hairpin-shaped weftsbeing picked into the shed from the other end, while the picks from oneend of the shed alternate with the picks from the other end of the shed,the shed being changed between successive picks, wherein the improvementcomprises the steps of:

a. introducing at least two weft threads simultaneously in at least someof the picks from one end of the shed, so that at least some of thehairpin-shaped wefts introduced from that end of the shed consist of ahairpin-shaped sheaf of at least two threads; and

b. introducing only one weft thread in each of the picks from the otherend of the shed, so that all of the hairpinshaped wefts introduced fromthat end of the shed consist of a single thread, thus producing arippled fabric.

